Sequence Generator Checks; Table 5-4, Sequence Generator Checkout Procedure - Racal Instruments 3151 User Manual

3151 And 3151A User Manual
Sequence Generator
Checks
Step Test Point
1 U45 pin 1, U42 pin 11
2 U46 pin 1, and 3
3 U42 pin 12
4 U42 pin 8, U43 pin 14
5 U44 pin 14, U47 pin 14
6 U47 pin 5
7 U47 pin 2, and 3
Problems with the sequence generator circuits can be detected if the
Model 3151/3151A accepts word serial commands and responds
correctly to word serial queries, but fails to output sequences or
bursts. If there is a problem with the sequence generator circuits,
proceed with the checkout procedure given in Table 5-4.
Before starting the following procedure, reset the Model 3151/3151A
to the factory default using the *RST command. Configure the Model
3151/3151A to sequenced output mode and load three different
waveforms - 100 points long, to segments 1, 2, and 3, respectively.
Program each step to repeat once. Use the following commands
after loading the waveforms.
Remote Commands:

Table 5-4, Sequence Generator Checkout Procedure

Negative going pulses; 2 ns width, 100Fs period
Same as above
Negative going pulses; 100 Fs width, 200 Fs period
Negative going pulses; 2 Fs width, 100 Fs period
Same as above
Negative going pulses; 2 Fs width, alternating 100 Fs
and 200 Fs periods
Positive going pulses; 100 Fs width, 200 Fs period
The next checkout is done on the Model 3151/3151A configured to
operate in burst mode with 5 bursts. Use the following command to
configure the Model 3151/3151A:
Remote Commands:
:TRAC:SEL 1
:INIT:CONT OFF
:TRIG:BURS: ON
:FUNC:MODE SEQ
:SEQ:DEF 1,1
:SEQ:DEF 2,1
:SEQ:DEF 3,1
:OUTP ON
Expected Result
:FUNC:MODE USER
Maintenance and Performance Checks 5-23